title: Co-doped Y2O3:Tb3+/Tm3+ multicolor emitting phosphors for thermometry.
abstract: In this study, the new temperature-dependent phosphor, Y2O3:Tb3+/Tm3+, was investigated for high-temperature thermometry. The photoluminescence intensity at 456 nm emitted from Tm3+ was strong at temperatures higher than 1100 K, whereas the peak intensities emitted from Tb3+ decreased due to the thermal quenching effect. Thus, the intensity ratio between those emissions showed an appropriate variation for thermometry over a wide temperature range. In addition, the phosphors showed a distinct change of visible emission colors from green to blue with increasing temperature. These findings suggest the applicability of these phosphors in visual thermo-sensors.
authors.affiliation: School of Science for Open and Environmental Systems, Keio University, Yokohama, Kanagawa, Japan.
authors.forename: Naohiro
authors.initials: N
authors.lastname: Ishiwada
authors.forename: Satoko
authors.initials: S
authors.lastname: Fujioka
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Ueda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yokomori